Since updating to 3.6.15: have used Google search engine and have it as home page - will not load now, getting "Problem Loading Page". However, when hit FF home page icon 50% will get to Google.com. Once entered search criteria, then attempt to link to a website, I will also get the "Prob-Load-Page" message (about 50%of the time). Ditto percentage if I successfully get to website and click on a link. I have not identified any pattern: turned Norton Security off and on; same outcomes: 50% of the time, a link ends up with "PLP" message; initial Google home page gets "PLP" 100% of the time. At same time, when do get to a website, often get "script error" message asking if FF should block or continue the script. I opt to block: sometimes that works, sometimes FF appears to lock up. End up having to shut FF down and disconnect. Shutting FF alone or disconnecting alone, neither end the lock up.